GNU bug report logs - #63670
CI failure due to warning in diff.c

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Bruno Haible <bruno <at> clisp.org>
Cc: 63670 <at> debbugs.gnu.org
Subject: bug#63670: CI failure due to warning in diff.c
Date: Wed, 24 May 2023 10:25:45 -0700

[Message part 1 (text/plain, inline)]

On 2023-05-23 09:46, Bruno Haible wrote:

> The diffutils CI reports a build failure:
> 
> 
>    CC       diff.o
> ../../../sources/diffutils/src/diff.c: In function 'compare_files':
> ../../../sources/diffutils/src/diff.c:1209:8: error: missing initializer for field 'name' of 'struct file_data' [-Werror=missing-field-initializers]

I don't know how to find out the details of the diffutils CI build. 
However, I think the bug is probably that the build was using GCC 11.1 
or 11.2, which is buggy in this area. I installed the attached patches 
to Gnulib to work around that problem.

If you're configuring with --enable-gcc-warnings or equivalent, it's 
better to use current GCC. Older versions of GCC have several problems 
in this area, and although I went to the trouble of working around this 
particular problem I doubt whether it's worth our time to worry about 
all false positives generated by older GCC versions, so  it might be 
better to build with --disable-gcc-warnings on older platforms.

[0001-manywarnings-port-better-to-GCC-11.2-and-earlier.patch (text/x-patch, attachment)]

[0002-Simplify-Wno-missing-field-initializers-checking.patch (text/x-patch, attachment)]

[0003-manywarnings-speed-up-nomfi-test.patch (text/x-patch, attachment)]

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